For citations:

Valko A.L., Rudenko S.P., Sandomirski S.G. Translation of hardness numbers in testing of surface‑hardened steel products. Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY). 2022;(3):64-69. (In Russ.) https://doi.org/10.21122/1683-6065-2022-3-64-69